Installer detected as Trojan by Win Defender in Win 10

Trojan:Win32/Fathale.B!plock Category: Trojan Description: This program is dangerous and executes commands from an attacker. Recommended action: Remove this software immediately. Items: file:C:\Users\DM06\Downloads\Vivaldi.1.1.453.55.exe Is this a False Detection? Installer was from Vivaldi's site.